28026389193 has 16 divisors (see below), whose sum is σ = 43163637696. Its totient is φ = 15986531840.

The previous prime is 28026389189. The next prime is 28026389207. The reversal of 28026389193 is 39198362082.

It is a cyclic number.

It is not a de Polignac number, because 28026389193 - 2² = 28026389189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28026389123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24978396 + ... + 24979517.

It is an arithmetic number, because the mean of its divisors is an integer number (2697727356).

Almost surely, 2^28026389193 is an apocalyptic number.

It is an amenable number.

28026389193 is a deficient number, since it is larger than the sum of its proper divisors (15137248503).

28026389193 is a wasteful number, since it uses less digits than its factorization.

28026389193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49957944.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 28026389193 in words is "twenty-eight billion, twenty-six million, three hundred eighty-nine thousand, one hundred ninety-three".